Stackable cup



FIG. 1 is a perspective view of a stackable cup showing my new design;

FIG. 2 is a side view of the stackable cup as illustrated in FIG. 1;

FIG. 3 is a front view of the stackable cup as illustrated in FIG. 1;

FIG. 4 is a rear view of the stackable cup as illustrated in FIG. 1;

FIG. 5 is a top view of the stackable cup as illustrated in FIG. 1; and,

FIG. 6 is a bottom view of the stackable cup as illustrated in FIG. 1.

CLAIM The ornamental design for a stackable cup, as shown and described.